CI: Break a long line

4 jobs for master in 2 minutes and 31 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #231184
ubuntu-16.04

00:02:27

passed #231185
ubuntu-17.10

00:02:31

passed #231186
ubuntu-18.04

00:02:12

passed #231187
ubuntu-18.04-no-backend

00:02:13